Depending on how an app was designed and developed, updating for an iPad 3 Retina display could take days or weeks
Flash forward — After lining up for hours, or sitting at home all day waiting for a courier to arrive, you finally have your hands on an iPad 3 with its amazing Retina display. A display with over 3.1 million pixels. All of them difficult to distinguish, because they're so damn tiny. Text is crisp. Photos look are amazing. This thing is gorgeous.
You launch your favourite app and notice things aren't as amazing as they were a few seconds ago. The app in question doesn't contain Retina image assets -- the pictures that make up the user interface elements are at the iPad 2's screen resolution, so things look as blocky as they did on your previous iPad. What's going on?